I purchases a 3 year old paint/quarter horse one month ago and he was delivered two days later. When he got off the trailer he had a large, hard cold swelling on the inside of his front left pastern. The owner apologized and said if her turned up lame for any reason she would take him back. She thought he had either kicked himself or been kicked. He showed no signs of lameness but after a week and a half of worry I called the vet to take a look. He didn't think it was anything to worry about but gave me DMSO to apply and said to wrap his legs. He thought it was either a windpuff or he was kicked.
I have been riding and training normally with our lot of concern, he does kick himself and over reach so have him in splint boots and bell boots. I have worked mainly at a walk and trot but last night I tried to canter -in the arena he refused - put his head up and trotted very quickly. So I took him outside to a flat grassy area and was able to have him pick up the canter almost immediately. Here is the problem - he throws his right front leg out to the side in a slapping motion and wants to come to a stop after a few strides and then balks at moving forward at any gate. We did two short canters and then walked to cool off.
Is the cantering issue a side effect of the swollen pastern, a balance issue? I have checked and rechecked tack - not an issue and have not lunged at a canter.